Role of the substrate in monolithic AlGaAs nonlinear nanoantennas

Nanophotonics

article

Valerio Flavio Gili¹  Marco Finazzi²  Michele Celebrano²  Costantino De Angelis³  Giuseppe Leo¹  Luca Carletti³  Fares Chouchane¹  Guillaume Wang¹  Christian Ricolleau¹  Davide Rocco³  Aristide Lemaître⁴  Ivan Favero¹  Lavinia Ghirardini² 

[1] Université Paris Diderot – Sorbonne Paris Cité;Department of Physics;Department of Information Engineering, University of Brescia;Centre de Nanosciences et de Nanotechnologies

关键词: harmonic generation and mixing;    integrated optics devices;    subwavelength structures;   

DOI  :  10.1515/nanoph-2017-0026

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

We report the effect of the aluminum oxide substrate on the emission of monolithic AlGaAs-on-insulator nonlinear nanoantennas. By coupling nonlinear optical measurements with electron diffraction and microscopy observations, we find that the oxidation-induced stress causes negligible crystal deformation in the AlGaAs nanostructures and only plays a minor role in the polarization state of the harmonic field. This result highlights the reliability of the wet oxidation of thick AlGaAs optical substrates and further confirms the bulk χ (2) origin of second harmonic generation at 1.55 μm in these nanoantennas, paving the way for the development of AlGaAs-on-insulator monolithic metasurfaces.

【 授权许可】

CC BY